Car-truck side frame and journal-box.



E. W. SUMMERS. CAR TRUCK sms FRAME AND JOURNAL Box.

APPLICATION FILED JAN- I2. 1916.

Patented July 11, 1916.

2 SHEETS-SHEET I.

INVENTR WMM E. VV. SUMMEHS.

CAR TRUCK S'IDE FRAME AND JOURNAL BOX. APPucATloN HLED 11111.12, 1916.

2 SHEETS-SHEET 2.

WITNESSES INVENTQR Patented July 11, 1916.

i lt

'WEBSTER SUMMERS, 0F PLTTSBURGH, PENNSYLVANA.

CARLTBIUCK SlDE FRAME ANB i'l'OlUItMla-BOX.'

Spcicatioers Patent. Patjmmdl July Ml, i916.,

- application sled January ia, me. i serial n. 71,779.

Vment in Car-Truck Side Frames and J ournal-Boxes, of which the following is a specification.

' This invention relatesto side frames for railway car trucks and journal box therefor. 1

@ne object of -the invention is-to provide a` railway car truck side frame ot the arch bar type and a journal box so constructed box bolts. i

Another object is to provide a railway car truclr side trame of the arch bar type and a journal box directly connected thereto Y and so constructed that the neutral axes or centers otgravity o'l the tension and compression members ol' the' truck side trame intersect vertically over the axis of rotation of theaxle and as close down to the same as possible.

A., further object is to so construct the side frameas to permit the column posts maschine' to be secured to the arch bars byv riveting.

The invention comprises .the combination and arrangement ot parts hereinafter described and claimed.

inthe accompanying drawings Figure l is in part a side elevation and in part a longitudinal vertical section of a truck v,side frame and journal box embodying the invention; Fig. 2 is a plan view of the same; Fig. 3 is a section on the line 3 3 Fig. l; Fig. d is aplan view of the journal box; Fig. 5 is av side ele-ration oi? the same; and Figs. 6 and 7 are diagrammatic views illustrating thestresses set up in the end. portions of the tension and compression members of an old type of arch bar truck and in the design of truelf.; frames shown in Fig. 1, respectively. V

The truck side :trame is ot' the arch bar type havingan.upwardly bowed or arched compression member i. and a downwardly bowed tension member 2, the latter having Aits centralpportion, as at 3, formed on the arcof a circle or catenary curve, and with the end portions extending 'from said curved portions as true tangents. The tension and compression members are preferably formed of rolled flanged sections and as Aillustrated are of llsbeam section, placed with their -webs horizontal and their Hanges vertical. At their end portions some of the flanges of .these members are cut away so as to permit the Web s to come into contact,

yand said members-are secured together' by rivets 5 extending through said webs. ln the anglebetween the compression and tension members, 1s the gusset member G, shown 4 as a casting, although, if desired, it may be formed ofapressed plate or a forging, and which is secured to the tension and compression members by rivets 7. ylhe end portions of said tension and compression members are bent downwardly on a curve at thepoint of intersection of theirneutral axes orv centers ot' gravity, said point being indicated at 8, and have their outer ends inclined downwardly at the same langle from the vertical as the inclined portion of the tension member 2, thereby forming on the lower face of the end portion of said frame an upwardly converging obtuse angle With its apex rounded or curved, as shown in Fig. 1, in order vthat the point of intersection -of the neutral axes or centers of gravity of the arch bars may be brought directly above the center of rotation of the axle. ln o-rderthat the neutral axes of the teri'sion'andV compression members can intersect directly above the axis of rotation of the axle, it is necessary to bend the ends of said'tension and compression members on a curve struck about a center located in the verticalplane of theaxis of rotation. Such intersection of the neutral axes can not be obtained by the use of bars bent at an angle. This is made clear by-,tlie diagrams Figs. 5 and 6, in which Fig. illustrates an old type of arch bar frame, and Fig. 6 illustrates the principle of the frame ci. Fig. 1. As shown in'Fig. 5 Where the lower arch bar-2 is bent at an angle, the neutral axes a of the compression member and o ol the tension member intersect at the point c, which is outside of the plane ofthe center of rotation, the latter being indicated by the vertical line d.

The load is applied at c, in the ldirection of rl`he load therefore acts Assuming the load'to be that of a modern high .capacity freight car, to-wit., 34,250

lbs., and actmg upona lever arm l21/32 of'.

an inch, it produces a moment of 22,47 6 lbs., andas the section modulusof arch bars of the dimensions assumed is l.416, it results in a liber stress of 54,00() lbs. per square inch, which is approximately the breaking point. Whemhowever, the arch bars are bent lon a curve around a` center f located in the vertical plane of the center of rotation, the neutral axes aand b are made to intersect directly above the center of rotation, as indicated in Fig. 6. Consequently there is no eccentric 'loading whatsoever, and the only stresses produced in the arch bars are compression inthe upper archbar--and tension in the lower arch bar, there being no bending moment whatsoever, and no fiber stresses induced corresponding tothe fiber stresses above specified due to the eccentric loading where the neutral axes of the arch bars do not intersect in the vertical plane of the axisof rotation. At their central portions the tension and compression members are united by a combined column post and spring seat member, which comprises in a single integral castingthe vertical column post portion 9,

the bottom or spring seat portion 10 and a top connecting portion 11,-which fits in between the. tension and compression members and is suitablysecured thereto as by rivets, as illustrated. Spring plank members 18 are secured to this casting, such 'as by bolts 14. The springs rest upon the bottom portion 10 of this casting, and the verti- .ikku es cal portions are provided with thel usual bolster guides and brake hanger brackets, all as are common in car trucks.

One of the novel features of the present application is in having a journal box so constructed as to be secured directly to the end portion of the truck side' frame without the use ofjournal box bolts. As shown, the journal box 16 has its top roof-shaped with a rounded apex to fit into the obtuse angle formed'in the lowerface of the end portions of the side frame, the same being inclined or sloping symmetrically in opposite directions from its central longitudinal line, so als to have a rm bearing against the lower face of the-end portion of the side frame. The apex .of the box is curved' on a radius whose center of rotation is located-in a vertical plane lying in the axis of rotation-of the'axle and the top surface ofrsaid box is cored out to form ribs and to provide a cavity'at its central portion for the head of the rivet 5. The top ofthe box is provided with perforated- Vbosses 18 for receiving rivets 19 which extend through the same and the adjacent parts of the side frame and serve to rigidly secure the journal box to the side frame.

The outer4 one of these rivets 19 passes' throughthe end portions of the Webs ot'- lto the tension member.

.box and the truck side frame.

both the tension and compression member and also serves as a means for securing said members together, while the inner one of these rivets passes through the web of the `tension member and through a flange of the gusset member 6 and therefore also serves as a means for securing the gusset member To permit access for upsetting this inner rivet, the web ofthe 'compression member and the adjacent p0rtion of the gusset member 6 are provided with openings 20 for the insertion of a suitable riveting tool. The holes through the bosses 18 open into pockets 21 formed on the inside and at the upper corners of the journal box, soV that the inner heads of the rivets 19 do not interfere with the wedge and brass. l

By constructing the top of the box with oppositely inclined surfaces, as shown, the center of rotation of the axle 22 is brought vertically directly below the point of intersection of the neutral axes of the tension andcompression members, and up as close as possible to the p oint of said intersection. The box is rigidly held in place by means of the rivets 19, without use of journal box bolts, as is ordinarily the 4practice in arch bar trucks. To assist in holding the box in position, and particularly against stresses lengthwise of the side frame, a connection in the form of a tie bar member 23 is formed between the lower portion of the journal As shown, this tie-bar member 23 has its inner end secured by rivets 24 to the depressed central portion of the tension member and has its outer end secured by one or more rivets 25 to a lateral perforated ear or lug 26 on the lower portion of the 'ournal box. The j ournal box preferably 1s provided with a lug 26 on each side, and the sloping top surfaces are equal on both sides of the central longitudinal plane of the box. so that said box will interchangeably lit at either end of which acts by pressure instead of by repeated blows. The column post portion 9 1n horizontal cross section 1s of general channel shape, with one of the anges, to-wit, Hange-30, wide or deep, while the other flange 31 is relatively shallow or narrow, so as to permit ready access of the jaw of the riveting machine to the lower end of rivet 32 which is driven through the upper arch ,bar andthe upper portion of the column l member. At its lower end the column post member is provided with a pocket 33 so lo- 130 nal box formed sloping, as' shown, it is pos-v tti .incenso nal box itself is secured directly to the truck side frame. By having the top of the oursible to bring the center of rotation of the axle directly underneath the point of intersection of the neutral Vaxes of the tension and compression members and close up to the latter.

The form and construction of the different parts can be materially modified without departing from the invention as covered by the claims hereinafter following. Obviously the side frame can be formed asa casting, instead of being built up, as illustrated.

What l claim is i 1.' A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united, a journal box having its top fitting against and riveted directly tothe end por tions of said arch bar, anda tie bar member secured to the lower portion of said jour nal box and to the depressed central portion of the tension member.

2. A truck side frame of the arch bar type comprising a compression member and a tension -member having their end portions united, a journal box having its top fitting against the end portions of said'arch bars and provided'with perforated lugs for riveting the same directly to the arch bars, and a tie bar member secured to a perforated ear on the lower portion of the journal box and to the central depressed portion of the tension member. l i

, 3. A truck side frame of the arch bar type comprising a compression member andv a tension iiember having their end portions united and with. the end portions of both members bent and having a tangent inclined, downwardly on an jangle corresponding to the inclination of the tension member, and a journal box having its top formed to fit in said angle and being directly secured tothe side frame.

4. A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united and with the end portions of both members bent and inclined downwardly on an angle corresponding to the inclination of the tension member, a journal box having its top formed to fit in said angle and being directly secured to the side frame, and a tie bar member secured to the lower portion of said journal box and to the depressedl central portion of the tension member.

5. A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united and with the end portions of both members bent and having atangent inclined downwardly on an angle corresponding to .the inclination of the tension'member, and a journal box having its top formed i to fit in said angle and being provided with perforated bosses for directly securing the same to said arch bars. f

6. A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united and withthe end portions of both members bent and inclined downwardly on an angle corresponding to the inclinationof the tension member, a journal box having its top formed to t in said angle and being .provided with perforated bosses for directly securing the same to said arch bars, and a tie bar member secured to a perforated ear on the lower portion of the journal box and to the central depressed portion of the tension member. v '7. A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united and having the end portions of both members bent on a curve about a radial point which is vertically under the point of intersection of their neutral axes and .in-

clined downwardly on an angle corresponding to the inclination of the tension member, and a journal boxhaving its top formed to it in said angle and being directly secured to the side frame.

8. A truck side frame of the arch bar type comprising a compression member and" a tension ymember having their end portions united and having the end portions of both members bent on a curve about awradial point which is vertically under the point of intersection of their neutral axesrand inclined downwardly on an angle correspond# ing to the inclination of the tensin member, a journal box having its top formed'to fit in said angle, and fastening means extending through the top of said box and said arch A bars. l

9. A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united and having the end portions of both members bent on a curve about a radial point which is vertically under the point of intersection of their neutral axes and inclined downwardly on an angle corresponding 'to the inclination of the tension member, a journal box having its top formed to fit in said angle, and fastening means extending from the inside of said box through y the arch bars.

'10. rlhecombination of a journal box having its top higher at its longitudinal center than-at its sides,

I rotation. is located in vertically over the said said top having a curved apex the radius of which has its center of rotation located in a vertical plane lying in the' axis of rotationof the journal, and a truck side frame -of arch bar type having a tension member conforming to and resting on the top of said journal box.

. 11. The combination of a journal box having its top higher at its longitudinal center than at its sides, said top having a curved apex the radius of which has-its center of rotation located in a vertical plane lying in the axis of rotation of the journal, said top having slopes symmetrically each side of and at an equal angle with the said vertical plane, and a truck side frame of arch bar type having a tension member conforming to and resting on the top of said journal box.

12.` A journal box for arch bar trucks having its top higher at its longitudinal center thanat its sides, said top having a curved apex the radius of which has its center of rotation located in a vertical plane lying in the axis of rotation of the journal, said box being ribbed on its upper surface.

13. The combination of a truck side frame comprising a compression member and a tension member having their end portions,

united and, bent on a 'curve and inclined downwardly, and a journal box fitting in said angle and having its top higher at its longitudinal center than at its side and its apex curved on a radius whose centerof rotation is located in a vertical plane lylng inthe axis of rotation of the journal, sald radius being of such length as `to permit the` neutral axes of the tension and compression members of the side frame to intersect vertically-over the'said axis of rotation of the journal. j 14. The combination of a truck side frame comprising .a compression anddtensiony mem- 'ber-having theirl end -portions unlted and bent on a curve and inclined downwardly on an angle correspoding to `the inclination of the'tension member, and a journal box fitting in said angle and having its top sloping symmetrically each side of and at an equal angle with a vertical' plane ,lying inthe axis of rotation of the journal and having its apex curved on a radius whose center. of said vertical plane, said radius being of such length as to permit the neutral axes of the tension and compression members ofthe side frame to intersectaxis of rotation of the journal. .y

15. A journal box for arch bar trucks having its topprovided with perforated bosses for riveting to a side framel and with n lateral perforatedlug at its bottom for the attachment of ya tie bar member.

16. A journal box for arch bar trucks having its top inclined from its central longitudinal line in opposite directions and provided with perforations for riveting to n side frame and with lateral perforated lugs at its bottom forthe attachment of a tie bar member.

17. A journal box for arch bar trucks having its top inclined from its central longitudinal line in opposite directions and provided with pockets in its upper corners and perforations extending from said pockets through its top wall for receiving securing members.

18. A journal box for arch bar trucks having its top inclined from its central longitudinal line in opposite directions and provided with perforations for riveting to a side frame and with lateral perforated lugs at its bottom for the attachment of a tie bar l member,l the first named perforations excess to the securing rivet.

20. A truck side frame of the arch bar type, comprising tension and compression members having their end `portions united and their middle ortions separated, and a column post mem er secured by rivets between the middle portions of said tension and compression members, said column post member at its lower end being provided with an open pocket extending between the sides of Said member from the spring seat side and having its bottom sloping downwardly toward the spring seat side to permit access to the securing rivets. j

21; A journal box for arch bar trucks having the outer face of its top inclined from its central longitudinal line in opposite directions andhaving the'inner face of its top solid at thecentral portion to form a bearing for the stop wedge and provided with perforations extending through its top from its upper corners for receiving securing rivets.

22. A .journal box for arch bar trucks having the outer face of its top inclined from its central longitudinal line in opposite directions and provided on its inside with ,pockets in its upper corners and perforallO side frame7 of a journal box upon Whose to the end portion of said side frame rests, sai journal box being provided on its inside with pockets in its upper corners, thereby leaving the central portion of the'top Wall solid to form a bearing for the stop Wedge, and ,fastening means having heads seated in said pockets and extending through the top of the journal box and through the side frame.

24. The combination With an arch bar side frame, of a journal box having the central portion of its inside top Wall solid to form a bearing for the stop Wedge, and provided with perforated bosses at the sides of said solid Acentral portion, and fastening means extending through said perforated bosses and through the side frame.

25. A truck side frame of the arch bar type comprising a compression member and a tension member having their end portions united and forming a journal box seat, and a journal box fitting in said seat and provided With perforated lugs for riveting the same to the end portions of said side frame, the rivet through one of said lugs passing through the tension member of the side frame, and the compression member of the side frame being provided With an opening to permit access to said rivet.

ln testimony whereof, I have hereunto set my hand.

EDGAR WEBSTER S i `WEBS.

Witnesses:

GLENN H. LERESCHE, ELBERT L. HYDE. 

